Method of making glass molds



Dec. 7 1926. 1,609,708

B. c. GILLIGAN METHOD OF MAKING GLASS MOLDS ori inal Filed y 17. 1924 v EQQ ??9- l I 9 L v ,2

a j i J A T I/ I 7 1 g i a Z l fl i Z Qmmvroz Berna/"d C. 677/4901? j 5% I I i flwpm %w 1? mega Patentecl Dec. 7, 1926.

UNITED STATES PATENT OFFICE.

BERNARD C. GILLIGAN, OF ST. MARYS, WEST VIRGINIA.

METHOD or MAKING GLASS MoLns- Originalapplication filed July 17, 19 24,

i shell or casing of the mold is prevented.

The compositions for lining such molds commonly include a considerable portion of graphite or similar material, and suitable compositions which may be employed in carrying out the improved method are described in my earlier Patents Nos. 892,589 of July 7, 1908; 1,165,003 of December 31,

1915, and 1,319,151 of October 21, 1919.

It is very important that the composition linings of molds of the character referred to be permanently secured to the metal shell or casing, and by the present invention, it is possible to provide a mold having a composition lining firmly connected to a metal shell or casing and its inner surface accu' rately shaped to the desired configuration.

As a means of facilitating a ready understanding of the improved method, reference is made to the accompanying drawing, in which Fig. 1 is an elevation orinner face view of one section of a metal mold shell or casing.

Fig. 2 is an elevation of a block of composition adapted to form a lining for the mold section shown in, Fig. 1, prior to such block being engaged with the mold.

Fig. 3 is a sectional view substantially on the line 33 of Fig. 1. Y

Fig. 4 is asectional view-substantially on the line 44 of Fig. 2. 7

Fig. 5 is a view similar to Fig. 3, showing the lining body or block in position Within the mold shell.

Fig. 6 is an elevation of in Fig. 5, and

Fig. 7 is a transverse sectional view through completed mold constructed in acthe parts shown Serial No. 726,540. Divided and this application filed April 21, 1926.' Serial No. 103,552.

cordance with the methodof the present invention..

Referring to the drawings, 1 designates the metal shell or casing of a mold section, which, as shown, is provided with ears 2, 3 adapted to receive between them the ear of a companionsection 4, said ears being provided with aligned apertures 5 adapted to receive a pintle pin 6, thus constituting a hinge about which the mold sections may be relatively turned. Each mold section is provided with a suitable handle 7.

The metal shell or casing section 1 is provided with a composition lining, and according to the present invention, such lining is engaged with the metal shell by riblike portions thereof engaging grooves 8, 9, l0 and 11 formed in the metal casing. As shown, the grooves may be undercut or made of dove-tail form in Vertical cross secwith projecting ribs 13, 14, 15 and 16 adapted-to severally bereceived in the grooves 8, 9, 10 and 11 of the metal casing member 1, and the dimensions of the block 12 are such that it can be engaged'with the metal section 1, the several ribs fitting loosely in the grooves or channels formed in the casing section.

Preliminary to inserting the block of composition '12 inthe casing section 1; the inner face of the latter and the walls of the grooves thereof, as wellas the curved surface of the block 12, are coated with a suitable cement, which, by the subsequent action of heat, will harden, and serve as a means to connect the lining to the metal surface. Such cement coating is indicated at 17 in Figs. 5 and 6..

If preferred, the composition lining may be applied to the inner surface of the mold section 1 while in a plastic condition, the face of the mold being coated with a suitable cement, as above stated.

. As shown in Fig. 5, the body of the comosition lining may initially project slightly Beyond the face of the metal casing section 1, as indicated at 18, such projecting portion being subsequently trimmed olf so that the face edges of the lining will be flush with the adjacent surface of the metal shell and the two portions of the mold can be accurately closed upon each other for use.

After the metal shell member 1 has been provided with a. body of composition lining material, as described, a series of sockets are drilled in the face of the metal body and the lining material, into which are screwed screws 20, the enlarged heads of which are received in countersunk recesses formed partially in the metal shell and partially in the adjacent composition lining. Said screws 20 constitute an additional means for securing the lining to the metal shell. and a series of said screws 21 are providedin the metal body of the mold section and adapted to exert pressure on the lining in opposition to the pressure exerted by the screws 20.

After the lining material has thus been firmly secured to the metal shell, the inner face thereof is, by the use ofsuitable tools, such as drills and reamers, given the required shape.

In preparing the lining for a mold of the particular form illustrated, the projecting portions 18 of the lining body would be carefully removed, after the screws 20. 21 had been properly applied, and then the two mold sections being brought. into the close relation illustrated in Fig. 7, the boring or reaming tools can be caused to co-operate to provide the mold chamber of the exact dimensions and form required for the article to be blown therein.

The invention is not limited. of course, to manufacture of molds having an opening at the top and bottom, as shown, but may be carried out with molds closed at one end, it merely being necessary to make the body of the mold casing or shell ofsectional form and secure, as described, to each such section, a suitable body of the composition lining material, such body being subsequently shaped, as described, by suitable tools.

Preferably, the mold sections will be subjected to heat to set the cement, before referred to, after the fastening screws 20, 21' have been applied, and before the inner surface of the composition lining is given its final shape.

Having thus described the invention, what is claimed is r 1. The herein described method of con.- structing molds for glass articles comprising afiixing a composition lining to the inner tion linin surface of a metal shell, and then shaping the lining to conform to the cont-our of the article to be molded.

2. The herein described method of providing a metal glass mold with a composi tion lining, comprising initially externally shaping a suitable composition body to adapt it to conform to the inner surface of a wall of a metal mold, securing said shaped body to the mold wall to prevent relative movement. between them, and shaping the inner surface of the lining to the contour of the article to be molded.

3. The herein described method of providing a metal glass mold with a composition lining, comprising initially externally shaping a suitable composition body to adapt it to conform to the inner surface of a wall of a metal mold, interposing a binding medium between the metal shell and composition body, applying heat to render the binding medium effective to secure the lining to the shell, and shaping the inner surface of the lining to conform to the contour of the ar-.

tiele to be molded.

4. The herein described method of providing a metal glass mold with a composition lining. comprising initially externally shap- 'ing a suitable composition body to adapt it to conform to the inner surface of a wall of a metal mold, securing said body to the wall of the mold by an interposed binding me dium and mechanical fastenings, whereby relative movement between the mold wall and lining is prevented. and shaping the inner surface of the lining to the contour of the article to be molded.

5. The herein described method of pro viding a metal'glass mold with a. composi' comprising initially externally shaping a suitable composition body to adapt it to conform to the inner surface of a wall of a metal mold, securing said body to the wall of the mold by an interposed cement and mechanical fastenings having threaded engagement with the mold wall, and shaping the inner surface of the lining to the contour of the article to be molded.

6. The herein described method of constructing molds for glass articles, comprising afiixing to the inner surface of each of a plurality of sections, adapted to collectively form a metal mold shell, a body of composition lining material, securing the bodies of lining material to the respective mold sections to prevent relative movement between each mold section and the associated body of lining material, thereafter assembling the several composition faced mold sections, and shaping the lining to the contour of the article to be molded.

In testimony whereof Ihave hereunto set my hand.

BERNARD C. GILLIGAN. 

